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Spider web music – level 2
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Scientists studied 3D models of spider webs, and they...Fewer cars in the streets of Baku – level 1
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Baku in Azerbaijan changes how people move in the...Fewer cars in the streets of Baku – level 2
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Baku, Azerbaijan, is changing its transport system to make...How Video Calling Started – level 1
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Video calling is a technology when you call somebody....How Video Calling Started – level 2
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In the late 1890s, people started to think that...